[FS#1001] Dns ipv6 problem when interface restart

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - Ansuel (Ansuel) 

Attached to Project - LEDE Project
Summary - Dns ipv6 problem when interface restart
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details -  - Device problem occurs on : WRT3200ACM 
 - Software versions of LEDE: LEDE Reboot SNAPSHOT r4794-f3b4e50cee
 - Steps to reproduce

Sometime when i restart my ipv6 interface it doesn't get ipv6 dns... this cause problem with the entire ipv6 system, as it has an ip but it doesn't have dns to solve ip. 

this is log (hope it doesn't contain anything private...)

https://pastebin.com/EEPxVxXg

Isp is TIM, it gives me only a /64 address... We need to have 2 pppoe interface to use dual stack...
   

 

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1001